ZIP 21778 vs ZIP 21784
A side-by-side comparison of ZIP Code 21778 and ZIP Code 21784: population, income, housing, and more.
ZIP 21778 and ZIP 21784 are ZIP Code areas in Maryland. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
ZIP 21784 has the higher population (37,813 vs 840 in ZIP 21778). ZIP 21784 has the higher median household income ($141,228 vs $110,489 in ZIP 21778). ZIP 21784 has the higher median home value ($478,200 vs $415,700 in ZIP 21778).
Population, income & housing
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| Population | 840 | 37,813 |
| Median age | 51.8 yrs | 39.5 yrs |
| Median household income | $110,489 | $141,228 |
| Median home value | $415,700 | $478,200 |
| Median gross rent | — | $1,673 |
| Housing units | 363 | 13,664 |
| Homeownership rate | 95.2% | 87.0% |
| Bachelor's degree or higher | 23.1% | 53.2% |
| Unemployment rate | 0.0% | 3.5% |
Trends (ACS 5-year, 2019–2023)
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| Population | 909 → 840 (-7.6%) | 37,365 → 37,813 (+1.2%) |
| Median household income | $74,375 → $110,489 (+48.6%) | $117,310 → $141,228 (+20.4%) |
| Median home value | $294,900 → $415,700 (+41.0%) | $386,900 → $478,200 (+23.6%) |
| Median gross rent | — | $1,228 → $1,673 (+36.2%) |
ZIP 21778
909840
$74,375$110,489
$294,900$415,700
ZIP 21784
37,36537,813
$117,310$141,228
$386,900$478,200
$1,228$1,673
Age & race/ethnicity
Age distribution (share)
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| Under 5 | 7.3% | 6.0% |
| 5 to 17 | 9.8% | 18.1% |
| 18 to 24 | 12.3% | 7.4% |
| 25 to 34 | 1.8% | 11.4% |
| 35 to 44 | 6.2% | 15.0% |
| 45 to 54 | 18.6% | 14.6% |
| 55 to 64 | 15.6% | 12.0% |
| 65 to 74 | 16.8% | 8.5% |
| 75 and over | 11.8% | 6.8% |
Race & ethnicity (share)
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| White (non-Hispanic) | 100.0% | 79.8% |
| Black or African American | 0.0% | 5.7% |
| American Indian & Alaska Native | 0.0% | 0.0% |
| Asian | 0.0% | 4.1% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.0% | 0.8% |
| Two or more races | 0.0% | 3.7% |
| Hispanic or Latino | 0.0% | 5.8% |
Educational attainment (age 25+)
Share of adults 25+
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| No high school diploma | 6.1% | 4.3% |
| High school graduate | 35.7% | 18.2% |
| Some college or associate's | 35.2% | 24.2% |
| Bachelor's degree | 5.4% | 30.9% |
| Graduate or professional degree | 17.7% | 22.3% |
Commute to work
How workers get to work (share)
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| Drove alone | 58.2% | 73.9% |
| Carpooled | 24.5% | 4.0% |
| Public transit | 0.0% | 0.5% |
| Walked | 0.0% | 0.7% |
| Bicycle | 0.0% | 0.0% |
| Worked from home | 17.3% | 20.2% |
| Other means | 0.0% | 0.7% |
Housing
Units in structure (share)
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| 1-unit, detached | 92.8% | 78.7% |
| 1-unit, attached | 6.3% | 11.7% |
| 2 to 4 units | 0.0% | 2.0% |
| 5 to 19 units | 0.0% | 4.9% |
| 20 or more units | 0.0% | 2.6% |
| Mobile home & other | 0.8% | 0.2% |
Poverty & households
| ZIP 21778 | ZIP 21784 | |
|---|---|---|
| Poverty rate | 0.0% | 4.1% |
| Average household size | 2.54 | 2.78 |
| Mean commute (minutes) | 30 | 35 |
| Median year structure built | 1970 | 1986 |